Aquatic exercise tank



FIG. 1 is a perspective view of an aquatic exercise tank showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an elevational view showing one end thereof; and

FIG. 6 is an elevational view showing the opposite end thereof. 

The ornamental design for an aquatic exercise tank, substantially as shown. 